Minoxidil Topical Dosage

Usual Adult Dose for Alopecia

Solution:
Apply 1 mL topically to the affected area(s) of the scalp twice a day. The dose should not exceed 2 mL per day.

Foam:
Apply half a capful topically to the affected area(s) of the scalp twice a day.

Renal Dose Adjustments

Data not available

Liver Dose Adjustments

Data not available

Precautions

Although topical minoxidil has not been shown to cause adverse systemic effects, local abrasion or dermatitis may theoretically increase systemic absorption of minoxidil and increase the risk of side effects.

Patients with a history of underlying cardiac disease should be monitored closely, at 1 month and at 6 months of treatment, for development of adverse events, such as tachycardia, fluid retention, increased heart rate, weight gain, or other systemic effects. If systemic effects occur, discontinue use.

Avoid concomitant use with other topical agents that are known to enhance percutaneous absorption.

Safety and effectiveness have not been established in pediatric patients (less than 18 years of age).

Dialysis

Data not available

Other Comments

Patients may not realize hair growth for the first 4 months or more with the 2% solution or 2 months or more with the 5% solution or foam. If the drug is applied with the hands instead of using a spray, hands should be washed thoroughly after application or gloves should be worn.

Hair loss may recur within 3 to 4 months after minoxidil topical treatment is stopped.